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PN4392 from FAIRCHILD,Fairchild Semiconductor

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PN4392

Manufacturer: FAIRCHILD, CAL

N-channel silicon field-effect transistors

Partnumber Manufacturer Quantity Availability
PN4392 FAIRCHILD, CAL 6467 In Stock

Description and Introduction

N-channel silicon field-effect transistors The PN4392 is a versatile N-channel JFET (Junction Field-Effect Transistor) designed for low-noise amplification and switching applications. Known for its high input impedance and low leakage current, it is commonly used in audio preamplifiers, signal processing circuits, and sensor interfaces where minimal signal distortion is critical.  

With a maximum drain-source voltage of 30V and a low gate cutoff voltage, the PN4392 ensures stable performance in a variety of analog circuits. Its low input capacitance makes it particularly suitable for high-impedance applications, reducing loading effects on preceding stages. Additionally, the device exhibits excellent thermal stability, making it reliable in both commercial and industrial environments.  

The PN4392 is available in a TO-92 package, facilitating easy integration into through-hole PCB designs. Engineers often favor this component for its consistent performance, low power consumption, and compatibility with automated assembly processes.  

When selecting the PN4392, designers should consider its operating conditions, including voltage and temperature ranges, to ensure optimal functionality. Proper biasing and circuit design are essential to maximize its noise performance and gain characteristics. Overall, the PN4392 remains a dependable choice for precision analog applications requiring efficient signal control.

Application Scenarios & Design Considerations

N-channel silicon field-effect transistors

Alternative Part Number

  • 2N4392 --: Same JFET family with nearly identical N-channel depletion-mode specs (Vgs(off), Idss, rds(on)); direct functional drop-in in most circuits.
  • J112 --: N-channel JFET switch with comparable on-resistance and pinch-off voltage range; widely available and often used where PN4392 switching behavior is needed.
  • BF245A --: Low-noise N-channel JFET with similar small-signal characteristics; suitable substitute for general-purpose amplification and switching applications.
  • 2N4392 --: Industry-standard N-channel JFET with the same 4392 die type and nearly identical key parameters, widely available and a direct functional drop-in.
  • J113 --: N-channel JFET with comparable low-noise switching characteristics; usable substitute where exact pinch-off voltage matching is not critical.
  • BF245A --: General-purpose N-channel JFET offering similar small-signal behavior; acceptable alternative for non-critical analog and switching applications.

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